Refrigerating machine



April 18, 1933. I c. STEENSTRUP I 1,904,561 1 REFRIGERATING MACHINEFiled June 10, 1931 His Atfcorney.

Patented Apr. 18, 1933 Urns!) s'r-A'res PATENT OFFICE CHRISTIANSTEENSTRUP, OF SCHENECTADY, NEW YORK, ASSIGNOB- TO GENERAL ELECTRICCOMPANY, A CORPORATION OF NEW YORK BEFBIGERATING MACHINE Applicationfiled June 10,

My invention relates to refrigerating machines, and more particularlymachines of the type'having a compressor enclosed in a casing containinga body of oil in the lower portion thereof to provide for lubricatingthe compressor.

It has been proposed to support machines of this type heretofore at thebottom of the casing. In such-a construction heat has 19 been conductedfrom the bottom of the easing to the supporting base, which resulted incooling of the lubricating oil and condensation of refrigerant in theoil. This condensation of refrigerant in the oil impairs its lubricatingqualities and makes the machine noisy in operation.

The object of myinvention is to provide a simple construction forsupporting a machine, and" an arrangement such that the 29 lubricantretains heat to such an extent as to prevent the condensation 'ofrefrigerant therein. I accomplish this by constructing the support insuch manner that it is con ductively isolated from the portion of the 5casing containing the body of lubricant to allow the body of lubricantto retain heat, and support the machine-in an opening in a base so as tosimplify the construction.

Further objects and advantages of my invention will become apparent asthe following description proceeds, and the various features of noveltywhich characterize my invention are pointed out with particularity inthe claims annexed to and forming a part of this specification. For abetter understandin of my invention reference may be had to thefollowing description taken in connection with the accompanying drawinin which Fig. 1 is an elevation view,

partly roken away, of a refrigerating machine embodying my invention;Fig. 2 is a perspective view of certain parts of Fig. 1, and Fig. 3 is asectional view of part of the construction shown in Fig. 1.'

Referring to the drawing, 1 have shown my invention in connection with acompression refrigerating machine of the general construction shOWn inmy United States Letters Patent No. 1,736,635 granted November 19, 1929.This machine comprises a compresin contact with the body of lubricatingoil 5 1931. Serial No. 543,406.

sion casing 1 having a motor 2 and compressor 3 arranged therein whichare supported in the casing on springs 4 and arranged above a body oflubricating oil 5 therein. The compressed refrigerant gas is dischargedfrom the compressor 3 into the casing 1 and flows through a connection 6into an air cooled condenser coil 7 which is arranged about an annulusof zig-zag heat dissipating elements or fins 8 secured to the casing 1,as described in my United States Letters Patents Nos. 1,797,029 and1,797,030 granted March 17, 1931. In this construction the fins 8 are ingood thermal contact" with both the condenser coil 7 and easing 1 foreffectively coolin the condenser coil and for dissipating t e heat ofthe motor 2 and compressor 3 from within the casing. The refrigerant iscondensed in the coil of pipe 7 and flows therefrom, under the controlof a float valve 9, through a pipe 10 into an evaporator 11 supported bya hollow base 12 containing insulation 13 which isadapted to beremovably supported in an opening of a refrigerating cabinet, and thevaporized refrigerant is withdrawn from the evaporator 11 by thecompressor 3 through pipe 14; where it is compressed again and therefrigerating cycle repeated.

In accordance with my invention, I support the casing by the annulus offins 8 formed, as indicated at 15, to entirely separate them from theportion of the casing and thereby reduce conduction of heat from thebody of oil to the fins. The bottom of Y the casing 1 is oonductivelyisolated from the walls of the hollow base 12 by clamping the bottoms ofthe fins 8 to an upwardly flared edge 16 of an opening in a top wall 17of the hollow base, as indicated at 18, which avoids the conduction ofheat from the bottom of the casing to the base. I prefer to secure thefins 8 to the edge 16 about the opening in the base by formingprojections 19 at the lower ends of the fins which are bent about theedge 16 to secure the machine to the base, and secure a ring 20 betweenthe projections and the flange for retaining a gasket 21 about theflange.

This arrangement considerably simplifies the construction, as a massivebase construction is not required.

Moisture is prevented from getting into the insulation 13 within thehollow base 12 by the insulating gasket 21 of low thermal conductivity,such as a hollow rubber tube, which forms substantially an air-tightseal between the upwardly flared edge 16 and the bottom of the casing 1.This gasket is retained in place by bending a downwardly extendingportion 22 of the ring 20 about the gasket as shown in Figs. 1 and 3.

With this construction the portion-of the fins 8 above the body oflubricating oil 5 cools the condenser coil 7 and dissipates the heat ofthe motor 2 within the casing whereas the portion of the fins entirelyspaced from the part of the casing in contact with the lubricating oilonly cools the condenser coil 7. In this manner the body of lubricatingoil 5 retains heat to maintain it at a higher temperature than thecondenser coil 7. and the compressed refrigerant gas will flow into thecondenser coil a d not condense in the lubricating oil. In addition thetop wall 17 of the hollow base 12 cooperates with the fins 8 indissipating heat to aid in the nroper cooling of the machine.

Although I have shown my improved support in connection with aparticular type of refrigerating machine, I do not wish to be limited tothe particular arrangement set forth, and I intend in the appendedclaims to cover all modifications which do not depart from the spiritand scope of my invention. 7

. What I claim as new anddesire to secure by Letters Patent of theUnited States is:

1. A refrigerating machine including a compressor and an enclosingcompression casing, said casing containing a body of lubricant toprovide for lubricating the com pressor, and means conductively isolatedfrom the portion of said casing containing the body of lubricant forsupporting said casing. y

2. A refrigerating machine including a compressor and an enclosingcompression casing, said casing containing a body of lubricant toprovide for lubricating the compressor, and means in spaced relation-tothe entire portion of said casing in contact with the body of lubricantfor supporting said casing.

3. A refrigerating machine including a compressor and an enclosingcompression casing, said casing containing a body of lubricant toprovide for lubricating the compressor, and means extending from theportion of the casing above the body of lubricant and entirely separatedfrom the portion of said casing containing the body of lubricant forsupporting said casing.

4. A refrigerating machine including a neoe eei compressor and anenclosing compression casing, said casing containing a body of lubricantto-provide for lubricating the compressor, a condenser coil arrangedabout said casing and receiving refrigerant therefrom, and meansconductively isolated from the portion of said casing containing thebody of lubricant for supporting said casing.

5. A refrigerating machine including a compressor and an enclosingcompression casing, said casing containing a body of lubricant toprovide for lubricating the compressor, a condenser coil, and meansincluding heat dissipating elements in heat exchange relation with saidcondenser coil and said casing and conductively isolated from theportion of said casing containing the body of lubricant for supportingsaid casing.

6. A refrigerating machine including a compressor and an enclosingcompression casing, said casing containing a body of lubricant toprovide for lubricating the compressor, a condenser coil, and meansincludi ng heat dissipating elements secured in heat exchange relationwith the portion of said casing above the body of lubricant and entirelyseparated from the portion of said casing containing the body oflubricant for supporting said casing, said heat dissipating elementshaving their outer ends in heat exchange relation with said condensercoil.

7. A refrigerating machine including a compressor and an enclosingcompression casing, said casing containing a body of lubricant toprovide for lubricating the compressor, a base having an openingtherein,

means in spaced relation to the entire porlubricant for supporting saidcasing in the opening in said base, and means between the edge of theopening in said base and said casing to form a seal.

8. A refrigerating machine including a compressor and an enclosingcompression casing, said casing containing a body of lubricant toprovide for lubricating the compressor, a base having an openingtherein, means including heat dissipating elements in heat exchangerelation with said condenser coil and said casing and in spaced relationto the entire portion of said casing in contact with the body oflubricant for supporting said casing in the opening in said base, andmeans including a material of low thermal conductivity between the edgeof the opening in said base and said casing to form a seal.

9. A refrigerating machine including a .compressor and an enclosingcompression caslng, said casing contalnlng a body of lubricant toprovide for lubricating the compressor, a condenser coil, a hollow basehaving an opening in the top wall thereof, means including a pluralityof fins secured in heat exchange relation with said condenser coil andthe portion of saidcasing above the body of lubricant and entirelyseparated from the portion of said casing containing the body oflubricant, the bottoms of said fins being attached to the edge of theopen ing in said base for supporting said casing, and means including amaterial of low thermal conductivity between the edge of the opening insaid base and said casing forming a seal between said casing and saidbase.

10. A refrlgeratmg machlne including a compressor and an enclosincasing, a condenser, heat radiating mem ers secured to said casing, anda supporting base having an opening therein, said casing being sup-'ported by said heat radiating members on the wall of said base about theopening there- 1n.

11. A refrigerating machine including a motor and compressor unit, acasing enclosing said motor and compressor, a plurality of fins securedto said casing, a condenser arranged in heat exchange relation with saidfins and communicating with said compressor, and a base having anopening therein, said fins being secured in the opening in said base forsupporting the machine.

In witness whereof, I have hereunto set my han CHRISTIAN STEENSTRUP.

